Microsensor MPM489W Operation Manual page 13

This method can not only clear water flowing pressure and wave
influence, but also filter the sand and mud.
6.3 Electrical Connection
Wires could be connected based on terminal definitions on production
quality certificate. The specific method is to see following steps.
6.3.1 Electrical connection method
Electrical connection method of transmitter with Two-wire 4mA~20mA
DC output, to see Fig. 11. (Cable connection) Three-wire
0~5VDC/1~5VDC/0.5~4.5VDC output, to see Fig.12.(Cable connection)
P/I Transmitter
P
P
Input
Air Pocket
Fig. 10
+V
0V/OUT
I
Fig. 11
Damper
DC current
+
U
Load
+
R
11
-
-
I
4mA 20mA
～